When you replace a TL431 Regulator that's already in a SMPS, is it necessary to program it before installation or is the circuit already designed to do that automatically whenever a new one is installed?
Thanks
Thanks
IMHO if you are going to jump to conclusions by reading the title of a datasheet and not digging further, you should probably give up expecting success in designing and building circuits. Programmable features in analog electronics existed in the literature and in practice for decades before there was such a thing as a processor that could execute a stored program. My sympathies are more than non-existent, but less than abundant.To come to @Lumenosity 's defense, it could be confusing to new electronics users...
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I gave a succinct description of the part and asked where the notion came from. Identifying the source of misinformation or misinterpretation seems like it might be a relevant thing for the TS and other readers of this thread. I hardly think I was offensive. Why did you think it was?Admittedly, this is an old part, with old terminology, and "adjustable" may be a better term, but as I noted, it can be confusing to new users.
I do not see a reason to post negative comments that could discourage folk to get into the wonderful field of electronics when a well worded explanation could fix the misunderstanding.
People come here for help and I do my best here to encourage folk, not put them down.
NO, it should give the same output there is no programming involved, just the resistors to set the voltage.When you replace a TL431 Regulator that's already in a SMPS, is it necessary to program it before installation or is the circuit already designed to do that automatically whenever a new one is installed?
Thanks
Well I don't accept it because maybe your dictionary has a different set of meanings for quaint than mine. It is also factually correct that the datasheet for the TL431 contains no substantiation for the meaning of "programming" associated with the TS's original question. I think you're trying to pick a fight for no real reason except to pick a fight. I'm not interested.I did not say your comment was offensive, but, if you would accept some critique, "quaint notion" is condescending.
And, IMHO, "Certainly not from the datasheet which you apparently failed to procure." is making an assumption, particularly as it has "Programmable" in the data sheet title.
@Lumenosity was not trying to design or build a circuit, but to fix an existing one.
Thank you for your kind response and assistance.If it is the same type number, it should be a drop in replacement.
Altering the voltage is done with the external resistors.
Why do you think it is faulty?
If you don't want a fight then you might try being a little less condescending and abrasive.I think you're trying to pick a fight for no real reason except to pick a fight.
OMG! What’s happening? People complaining about condescending attitudes. Notice they not addressing a posters problem. Which is the purpose of this forum.If you don't want a fight then you might try being a little less condescending and abrasive.
In all honesty, the thread is not really about how or why it failed or how I came to the conclusion, it's only about whether or not it needed programming before replacing. Getting into that discussion might derail the primary question of the thread.It would be quite unusual for a TL431 voltage reference to fail, so I'll ask @Lumenosity what evidence have you for that, and how did you test it? I would expect its failure, if it has, to be as a result of something else failing in a very significant way...
Thanks. I suspected that originally. (See Opening Post)The "programming" is done by two external resistors, which would already be in the circuit if you are replacing the device on a PCB.
When you replace a TL431 Regulator that's already in a SMPS, is it necessary to program it before installation or is the circuit already designed to do that automatically whenever a new one is installed?
Thanks
by Aaron Carman
by Jake Hertz
by Jake Hertz